We get many of these very nice older radios for service. I am aware of the one popular fix for the above listed problem. The SMT crystal under the top cover by the knobs and display can be defective or the radio falling to the ground dislodging the chip crystal from the board.
BUT we have several 350 G's in the shop with the above listed problem and it's NOT the easy fix of the crystal. Using substitute bench supply and the fuse is good. I hear a little pop in the speaker, when first turned on........Dead radio....no display. What suggestions do you fine folks have so I can get these units back in service.
Thanks ..................fred Greenville Pa.
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Re: No Display Dead Radio Kenwood TK 350 G
I would suggest to inspect all the solder joints using at least 10X microscope as well check for proper crystal oscillation. If everything looks normal then check the transistor(s) that turn the back light power ON for the LCD driver IC.
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Yes, radio. Check your cable. Is it OEM? Try plugging it into the radio before launching the software. Then try after launching the software. Is it a USB or Serial cable? If serial, the USB adapters often do not work. I have one brand of radio where I need to restart the computer each time I program so it will read the Serial to USB correctly. Even then, I may need to go into device manager and enable/disable it 2-5 times. I do not know if the software is the latest, but if a radio is programmed with the newest software, you cannot go back to an older version 90% of the time.
You'll need the Kenwood serial cable and software to program this radio. Your best bet would be to contact a Kenwood Customer Service Representative directly. You should have the the radios in front of you when you call so that you can answer questions about them instead of having to call back, etc.
Kenwood contact information can be found here. The TK-260 radio falls under the "Land Mobile & Business" category.
These radios can be programmed via the keypad. However, this
option must be enabled through the software, and must have a component
removed from the circuit board. If you have a radio that will not go
into self-programming mode when you use the proper key combination
(light button+dial button while turning the radio on), your radio has
not been enabled for this option.
Field Programming procedure for the Kenwood TK-270 or TK-370 handhelds.Press and hold (light) & (dial) while turning on radio.Hold until (SEL) appears on the display.Pressing (SCN) allows you to program the following1.Monitor KeyOff = off1 = Monitor momentary2 = Monitor Lock3 = Squelch off momentary2.Scan KeyOff = offCo = carrier operateTo = Time operate3.Dial KeyOff = offOn = enable4.TA keyTA = talkaroundRV = ReverseOff 5.Lo KeyOnOff6.PriorityNone1 = fixed2 = selected7.Fixed Priority ChannelTurn selector to channel8.Look back time ATurn selector to time in seconds9.Look back time BTurn selector to time in seconds10.Revert Channel1 = Selected2 = Last Call3 = Last used4 = Selected + Talkback5 = Priority6 = Priority + Talkback11.Tx Dwell timeTurn selector to time in seconds12.Drop out delayTurn selector to time in seconds13.Time out timerTurn selector to time in seconds14.Tot Pre-alertTurn selector to time in seconds15.Tot Rekey timeTurn selector to time in seconds16.Tot reset timeTurn selector to time in seconds
If you have the schematics try to follow the voltage lines with a volt meter. If this is beyond your capabilities then I would suggest taking the radio to a service center or sending the radio to Kenwood.